CN1050062C - Rotary gamma ray radiation unit - Google Patents

Rotary gamma ray radiation unit Download PDF

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Publication number
CN1050062C
CN1050062C CN96117370A CN96117370A CN1050062C CN 1050062 C CN1050062 C CN 1050062C CN 96117370 A CN96117370 A CN 96117370A CN 96117370 A CN96117370 A CN 96117370A CN 1050062 C CN1050062 C CN 1050062C
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CN
China
Prior art keywords
source
radiation unit
gamma ray
ray radiation
source body
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Expired - Lifetime
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CN96117370A
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CN1163155A (en
Inventor
宋世鹏
苏以翔
吕凤华
周定嵘
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Shenzhen Aowo Medical New Technology Development Co.,Ltd.
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Aowo International Science & Tech Development Co Ltd Shenzhen City
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Priority to CN96117370A priority Critical patent/CN1050062C/en
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Application granted granted Critical
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Abstract

The present invention provides a rotary gamma ray radiation unit. The present invention comprises a radiation shielding body 1 and a source body 2 arranged in the radiation shielding body, wherein multiple radioactive sources and ray paths thereof are arranged on the source body 2, gamma rays of the radioactive sources pass through the ray paths so as to be aligned with a public focal point 4 in the radial direction, the public focal point 4 is positioned on the central axis of the radiation unit, and a rotatable central shaft 6 arranged on the central axis of the radiation unit is connected with the source body 2 through a driving mechanism. The distribution latitude of the radioactive sources ranges from 45 DEG to 90 DEG, the public focal point 4 falls outside the cutting plane 7 of the source body, and a whole human body 8 can be accommodated in the space surrounding the public focal point 4; consequently, the radiotherapy of any position of the human body can be realized.

Description

Rotary gamma ray radiation unit
The present invention relates to medical gamma-ray radiation unit, especially have the rotary gamma ray radiation unit of a plurality of radioactive sources.
What rotary gamma ray radiation unit adopted is the operation principle of rotating focus, make a plurality of radioactive sources that are contained on the body of rotary source do the motion of conical surface rotating focus around the focus center, thereby kill lesion tissue, and that health tissues only is subjected to is instantaneous, does not have the irradiation of injury.Patent documentation WO94/23795 discloses a kind of rotary gamma ray radiation unit, and it comprises radiation shield and is placed in the intravital source of radiation shield body; A plurality of radioactive sources and ray channel thereof are arranged on the body of source, and the gamma ray of these radioactive sources is by ray channel, and from radially aiming at a public focus, public focus is positioned on the axis of radiating element; A rotatable central shaft is arranged on the axis of radiating element, the source body is fixed on the central shaft, distribution of radiation is being positioned at the 30 ° of scopes in addition in axis, promptly distribute latitude at 0 °～60 °, when the source body was done dynamic rotation, it was a plurality of taper seats of common vertex that lonizing radiation promptly form with the public focus; Around the public focus is a cavity that can hold patient head.Because the distribution latitude of radioactive source is lower, public focus drops on the cutting plane of source body, and the cavity around the public focus is less, can only carry out the irradiation to patient head.
The objective of the invention is provides a kind of novel rotary gamma ray radiation unit by adopting a kind of new radioactive source arrangement, thereby enlarges the space around the public focus, realizes the irradiation to any position of health.
To achieve these goals, the present invention has adopted following technical scheme: a kind of rotary gamma ray radiation unit comprises radiation shield and is placed in the intravital source of radiation shield body; A plurality of radioactive sources and ray channel thereof are arranged on the body of source, and the gamma ray of these radioactive sources is by ray channel, and from radially aiming at a public focus, public focus is positioned on the axis of radiating element; A rotatable central shaft is arranged on the axis of radiating element, central shaft connects with drive mechanism and source sports association, the distribution latitude of radioactive source is at 45 °～90 °, and public focus drops on beyond the cutting plane of source body, and the space around the public focus can hold whole human body.
Advantage of the present invention is, because the distribution latitude of radioactive source is at 45 °～90 °, public focus drops on beyond the cutting plane of source body, space around the public focus can hold whole human body, therefore expanded the object range that to shine greatly, not only head tumor can be treated, the tumor at other position of health can also be treated.
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the sketch map of an embodiment of rotary gamma ray radiation unit of the present invention;
Fig. 2 is the distribution of radiation sketch map of rotary gamma ray radiation unit shown in Figure 1;
Fig. 3 is the sketch map of a beam passage of rotary gamma ray radiation unit shown in Figure 1.
With reference to Fig. 1, Fig. 2 as can be known, in the present embodiment, rotary gamma ray radiation unit comprises radiation shield 1 with public axis, source body 2 and collimation body 3, and along the rotatable central shaft 6 of axis.
Radiation shield 1 adopts spheroidal graphite cast-iron for making material, and radiation shield 1 comprises two parts, and the first half is a spherical crown shape shield, is shaped as hollow spherical crown, and the latter half is the shield door of two fan semicylinder shapes.Between shield door and the spherical crown shape shield ball-screw drive mechanism is housed, and line slideway guiding coupling mechanism, intermesh with the ladder seam between the two fan shield doors.The nut of ball-screw is fixed on the spherical crown shape shield, and leading screw is fixed on the shield door, and under actuating unit drove, the nut of ball-screw was fixed, and leading screw can rotate and move.During treatment, motor just changes, and drives leading screw, and the shield door along continuous straight runs is opened.Treatment finishes, the motor counter-rotating, and shield door is tight closure once more.
Source body 2 is placed in the inside of radiation shield 1, and source body 2 adopts spheroidal graphite cast-iron for making material, and source body 2 is that hollow ball is crown, and the inner surface of its outer surface and radiation shield 1 coincide, and the gap is 1～2mm, and its inner surface is a concave spherical surface.With 27 radioactive source load chamber 11 and corresponding precollimator 12, be ray channel 15 in the middle of the precollimator 12 on the source body 2.Ray channel 15 is from radially aiming at a public focus 4, and public focus 4 is positioned on the axis.Precollimator 12 is used shielding material, makes as tungsten alloy.Radioactive source 14 is selected for use 60The Co source, 60The Co source is sealed in the source involucrum, and is placed in the radioactive source load chamber 11. 60The distribution latitude in Co source should be at 45 °～90 °, its objective is for public focus 4 is dropped on beyond the cutting plane 7 of source body.In the present embodiment, 60The distribution latitude in Co source is at 46.4 °～72.5 °. 60Co source line in the shape of a spiral distributes, like this, and each 60The residing latitude in Co source is all different, and when rotation therapy, the track while scan of each single bundle lonizing radiation can not overlap.
Collimation body 3 is placed in the inside of source body 2, and collimation body 3 adopts spheroidal graphite cast-iron for making material, and collimation body 3 is that hollow ball is crown, and the inner surface of its outer surface and source body 2 coincide, and the gap is 1～2mm, and its inner surface is a concave spherical surface.Collimation distributed on the body 3 set of shield rod and three groups of whole collimators 13, the shielding rod and every group end collimator 13 the regularity of distribution with 60The regularity of distribution in Co source is identical, and on same latitude, adjacent two groups differ 90 ° on longitude, promptly has 27 shielding rods and 3 * 27 whole collimators 13.Shielding rod and whole collimator 13 are all used shielding material, make as tungsten alloy.During non-treatment, the shielding rod is docked with precollimator 12, thereby realization is to the shielding of lonizing radiation; The centre of three groups of whole collimators 13 is a ray channel 15, and the aperture is respectively 3mm, and 6mm and 10mm during treatment, dock with precollimator 12 by the whole collimator 13 of selecting different apertures, thereby can obtain the irradiation field of different size.
With reference to Fig. 3 as can be known, each beam passage comprises radioactive source load chamber 11, precollimator 12, whole collimator 13 and intermediary ray channel 15 thereof, and ray channel 15 is from radially aiming at public focus 4.
In order to make public focus space on every side be enough to hold whole human body 8, the volume of source body 2 and collimation body 3 should be done lessly and guarantee enough shieldings again simultaneously, and therefore, the part 16 of the close cutting plane 7 of source body 2 and collimation body 3 is used shielding material preferably, as lead, as making material.
A rotatable central shaft 6 is housed along the axis, and the lower end of central shaft 6 is fixed on the collimation body 3, and the upper end links to each other with motor.Outside the central shaft 6 sleeve 9 is arranged, the lower end of sleeve 9 is fixed on the source body 2.On central shaft 6 tops ratchet and pawl arrangement 5 is housed, ratchet is fixed on the central shaft 6, and ratchet is fixed on the upper end of sleeve 9.Like this, when motor was just changeing, by ratchet and pawl arrangement 5, collimation body 3 and source body 2 wherein, collimated body 3 active rotation, the 2 driven rotations of source body to a synchronous low speed rotation of direction; When the motor reverse rotation, 3 rotations of collimation body, and source body 2 is motionless, thus can realize the aperture of whole collimator 13 is selected.Adopting the benefit of ratchet and pawl arrangement 5 is simple in structure, dependable performances.
Whole rotary gamma ray radiation unit supports with two supports 10, and the axis is perpendicular to ground.Like this, during rotation therapy, be parallel to the situation on ground, can not produce amount of deflection, thereby can improve the treatment precision with respect to desirable focus with respect to the axis; The lonizing radiation that pass human body 8 can be absorbed by ground, and are less to the pollution of surrounding; And whole device is solid and reliable.

Claims (9)

1. a rotary gamma ray radiation unit comprises radiation shield (1) and is placed in the interior source body (2) of radiation shield (1); A plurality of radioactive sources (14) and ray channel (15) thereof are arranged on the source body (2), and the gamma ray of these radioactive sources (14) is by ray channel (15), and from radially aiming at a public focus (4), public focus (4) is positioned on the axis of radiating element; A rotatable central shaft (6) is arranged on the axis of radiating element, central shaft (6) connects with source body (2) with drive mechanism, it is characterized in that: the distribution latitude of radioactive source (14) is at 45 °～90 °, and the cutting plane (7) that public focus (4) drops on source body (2) in addition; Public focus (4) space on every side can hold whole human body.
2. rotary gamma ray radiation unit according to claim 1 is characterized in that: the distribution of radioactive source (14) is wire in the shape of a spiral, and each radioactive source (14) is distributed on the different latitudes.
3. rotary gamma ray radiation unit according to claim 1 and 2 is characterized in that: described central shaft (6) is perpendicular to the ground.
4. rotary gamma ray radiation unit according to claim 1 and 2, it is characterized in that: also comprise a collimation body (3) in the inside of source body (2), on the collimation body (3) the some groups of whole collimators (13) with regularity of distribution identical with radioactive source (14) are arranged, the centre of whole collimator (13) is ray channel (15); One end of collimation body (3) is fixed on the central shaft (6), and the other end connects with source body (2) with drive mechanism.
5. rotary gamma ray radiation unit according to claim 4 is characterized in that: the drive mechanism between described collimation body (3) and the source body (2) is ratchet and pawl arrangement (5).
6. rotary gamma ray radiation unit according to claim 4 is characterized in that: the part (16) of the close cutting plane (7) of collimation body (3) and source body (2) is selected for use plumbous for making material.
7. rotary gamma ray radiation unit according to claim 3, it is characterized in that: also comprise a collimation body (3) in the inside of source body (2), on the collimation body (3) the some groups of whole collimators (13) with regularity of distribution identical with radioactive source (14) are arranged, the centre of whole collimator (13) is ray channel (15); One end of collimation body (3) is fixed on the central shaft (6), and the other end connects with source body (2) with drive mechanism.
8. rotary gamma ray radiation unit according to claim 7 is characterized in that: the drive mechanism between described collimation body (3) and the source body (2) is ratchet and pawl arrangement (5).
9. rotary gamma ray radiation unit according to claim 7 is characterized in that: the part (16) of the close cutting plane (7) of collimation body (3) and source body (2) is selected for use plumbous for making material.
CN96117370A 1996-12-17 1996-12-17 Rotary gamma ray radiation unit Expired - Lifetime CN1050062C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN96117370A CN1050062C (en) 1996-12-17 1996-12-17 Rotary gamma ray radiation unit

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Application Number Priority Date Filing Date Title
CN96117370A CN1050062C (en) 1996-12-17 1996-12-17 Rotary gamma ray radiation unit

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CN1163155A CN1163155A (en) 1997-10-29
CN1050062C true CN1050062C (en) 2000-03-08

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CN96117370A Expired - Lifetime CN1050062C (en) 1996-12-17 1996-12-17 Rotary gamma ray radiation unit

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296108C (en) * 2003-01-30 2007-01-24 武汉康桥医学新技术有限公司 Directional intensity ajustable radiation therapy apparatus
CN100428967C (en) * 2003-09-09 2008-10-29 武汉康桥医学新技术有限公司 Zoom ray focusing apparatus
CN107890612A (en) * 2017-12-05 2018-04-10 西安大医数码科技有限公司 One kind focuses on radiotheraphy device and equipment
CN109011219B (en) * 2018-08-24 2023-11-17 西安大医集团股份有限公司 Radiation therapy system and control driving method thereof
CN113082559B (en) * 2018-08-24 2023-07-18 西安大医集团股份有限公司 Source carrying body, collimation body, source device and radiation therapy system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1087551A (en) * 1993-04-13 1994-06-08 宋世鹏 Rotary cone focusing type gamma-ray radiation unit
CN1107374A (en) * 1994-02-26 1995-08-30 宋世鹏 Rotary focus type radioactive therapeutic apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1087551A (en) * 1993-04-13 1994-06-08 宋世鹏 Rotary cone focusing type gamma-ray radiation unit
CN1104548A (en) * 1993-04-13 1995-07-05 宋世鹏 Gamma-ray emitting unit with source on moveable support
CN1107374A (en) * 1994-02-26 1995-08-30 宋世鹏 Rotary focus type radioactive therapeutic apparatus

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Owner name: SHENZHEN CITY AOWO MEDICINE NEW TECHNOLOGY DEVELO

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